Question

The vectors A` and B` are such that |A`+B`|=|A`-B`|The angle between the two vectors is b) 180 a) 90 C) 0 d) 45

Answer 1

Answer:

90°

Explanation:

a2+b2+2abcoso=a2+b2-2abcoso

4abcoso= 0

coso=0

o=90°